docs: def edge_has_annotation(edge_data: EdgeData, key: str) -> Optional[Any]:
      """Check if an edge has the given annotation.
  
      :param edge_data: The data dictionary from a BELGraph's edge
      :param key: An annotation key
      :return: If the annotation key is present in the current data dictionary
  
      For example, it might be useful to print all edges that are annotated with 'Subgraph':
  
      >>> from pybel.examples import sialic_acid_graph
      >>> for u, v, data in sialic_acid_graph.edges(data=True):
      >>>     if edge_has_annotation(data, 'Species')
      >>>         print(u, v, data)
      """
      annotations = edge_data.get(ANNOTATIONS)
  
      if annotations is None:
          return None
  
      return annotations.get(key)